Truck roof unit



FIG. 1 is a front right perspective view of a truck roof unit showing our new design;

FIG. 2 is a front elevational view of the truck roof unit of FIG. 1;

FIG. 3 is a rear elevational view of the truck roof unit of FIG. 1;

FIG. 4 is a top plan view of the truck roof unit of FIG. 1;

FIG. 5 is a bottom plan view of FIG. 1; and,

FIG. 6 is a right side elevational view of the truck roof unit of FIG. 1, the left side elevational view being mirror symmetrical to FIG. 6.

The broken-line showing of marker light seats and a window depict environmental structure and form no part of the claimed design. 

The ornamental design for a truck roof unit, as shown and described. 